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Finding the Fourth Proportional to 20,744.50, 31,116.75 and 6,893.50

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Solution

The fourth proportional to 20,744.50, 31,116.75 and 6,893.50 is: 10,340.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,744.50 : 31,116.75 = 6,893.50 : x
  2. Step 2: Convert to fraction form
    20,744.50/31,116.75 = 6,893.50/x
  3. Step 3: Cross multiply
    20,744.50x = 31,116.75 × 6,893.50
  4. Step 4: Simplify right side
    20,744.50x = 214,503,316.13
  5. Step 5: Solve for x
    x = 214,503,316.13/20,744.50
  6. Step 6: Final answer
    x = 10,340.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.